/* ==================================================================
   Anatomy — Hollick-style field-guide plates
   Loaded after main.css / karpathy.css. Scoped to .anatomy-section.
   ================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Crimson+Pro:ital,wght@0,400;0,500;0,600;1,400&display=swap");

.anatomy-section {
  --cream:   #f5efe2;
  --cream-2: #ede5d3;
  --ink:     #2a2a2a;
  --ink-2:   #4a4438;
  --rust:    #b54a2a;
  --rust-2:  #8a3818;
  --navy:    #1f3a5f;
  --navy-2:  #15294a;
  --ochre:   #c7943d;
  --ochre-2: #a07925;
  --moss:    #5a7345;
  --hair:    #a89c80;

  --display: "Cormorant Garamond", "Source Serif Pro", Georgia, serif;
  --body:    "Crimson Pro", "Source Serif Pro", Georgia, serif;
  --label:   "Crimson Pro", Georgia, serif;

  /* break out of the 720px column */
  max-width: 1100px !important;
  margin-left: auto;
  margin-right: auto;
  padding: 3rem 2rem 4rem;
  background: var(--cream);
  background-image:
    radial-gradient(circle at 12% 18%, rgba(199,148,61,0.08) 0%, transparent 38%),
    radial-gradient(circle at 88% 76%, rgba(31,58,95,0.07) 0%, transparent 42%),
    radial-gradient(circle at 50% 50%, rgba(181,74,42,0.04) 0%, transparent 60%);
  color: var(--ink);
  font-family: var(--body);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  position: relative;
}

/* subtle parchment grain via repeating gradient */
.anatomy-section::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg,
      transparent 0px, transparent 3px,
      rgba(74,68,56,0.018) 3px, rgba(74,68,56,0.018) 4px),
    repeating-linear-gradient(90deg,
      transparent 0px, transparent 3px,
      rgba(74,68,56,0.018) 3px, rgba(74,68,56,0.018) 4px);
  mix-blend-mode: multiply;
  opacity: 0.7;
}

.anatomy-section > * { position: relative; z-index: 1; max-width: none; }

/* Section header */
.anatomy-section > h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 2.4rem;
  color: var(--ink);
  letter-spacing: 0.01em;
  border-bottom: 1px solid var(--hair);
  padding-bottom: 0.6rem;
  margin: 0 0 0.4rem;
}
.anatomy-section > h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 2px;
  background: var(--rust);
  margin-top: 0.55rem;
}

.anatomy-section .subtitle {
  font-family: var(--display);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--ink-2);
  margin: 0 0 2.5rem;
  letter-spacing: 0.01em;
}

/* Each plate */
.plate {
  background:
    linear-gradient(180deg, rgba(255,253,247,0.55), rgba(245,239,226,0.0) 80%),
    var(--cream);
  border: 1px solid var(--hair);
  border-radius: 2px;
  margin: 0 0 3rem;
  padding: 1.8rem 2rem 2rem;
  box-shadow:
    0 1px 0 rgba(74,68,56,0.05),
    0 12px 26px -16px rgba(42,42,42,0.25),
    inset 0 0 0 1px rgba(255,255,255,0.4);
  position: relative;
}

.plate::before {
  /* corner ticks like a real plate engraving */
  content: "";
  position: absolute;
  top: 8px; left: 8px; right: 8px; bottom: 8px;
  border: 1px solid rgba(168,156,128,0.45);
  pointer-events: none;
  border-radius: 1px;
}

.plate-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.2rem;
  border-bottom: 1px solid var(--hair);
  padding-bottom: 0.7rem;
  margin-bottom: 1.4rem;
  flex-wrap: wrap;
}

.plate-num {
  font-family: var(--display);
  font-variant: small-caps;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.22em;
  color: var(--rust);
}
.plate-num em {
  font-style: normal;
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  color: var(--rust);
  margin-left: 0.4em;
  font-weight: 600;
  vertical-align: -0.05em;
}

.plate-title {
  font-family: var(--display);
  font-weight: 500;
  font-style: italic;
  font-size: 1.55rem;
  color: var(--ink);
  margin: 0;
  letter-spacing: 0.01em;
  flex: 1 1 60%;
  text-align: right;
}

.plate-tag {
  font-family: var(--display);
  font-variant: small-caps;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  color: var(--ink-2);
  text-align: center;
  display: block;
  margin-top: -0.4rem;
  margin-bottom: 1.2rem;
}

/* Plate body: SVG + caption */
.plate-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.4rem;
}

.plate-svg-wrap {
  background:
    radial-gradient(circle at 50% 45%, #fbf7ec 0%, var(--cream) 70%);
  border: 1px solid rgba(168,156,128,0.5);
  border-radius: 2px;
  padding: 1.4rem 1.2rem;
  position: relative;
  overflow: hidden;
}

.plate-svg-wrap::after {
  /* engraving-style border */
  content: "";
  position: absolute; inset: 6px;
  border: 1px dashed rgba(168,156,128,0.35);
  pointer-events: none;
}

.plate-svg-wrap svg {
  display: block;
  width: 100%;
  height: auto;
  font-family: var(--label);
}

/* SVG typographic helpers (used inside SVG) */
.anatomy-section svg text { fill: var(--ink); font-family: var(--label); }
.anatomy-section svg .lbl-num {
  font-family: var(--display);
  font-weight: 600;
  fill: #fdfaf2;
  font-size: 13px;
  text-anchor: middle;
  dominant-baseline: central;
}
.anatomy-section svg .lbl-text {
  font-family: var(--label);
  font-size: 13px;
  fill: var(--ink);
  font-style: italic;
}
.anatomy-section svg .lbl-text-sm {
  font-family: var(--label);
  font-size: 11px;
  fill: var(--ink-2);
}
.anatomy-section svg .axis-label {
  font-family: var(--display);
  font-variant: small-caps;
  letter-spacing: 0.18em;
  font-size: 10px;
  fill: var(--ink-2);
}

/* Caption block under the SVG */
.plate-caption {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.7rem 1.4rem;
  margin-top: 0.4rem;
  padding: 0.8rem 0 0;
  border-top: 1px solid rgba(168,156,128,0.6);
  font-family: var(--body);
  font-size: 0.95rem;
  line-height: 1.45;
}

.cap-row {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
}
.cap-bullet {
  flex: 0 0 1.5em;
  height: 1.5em;
  border-radius: 50%;
  background: var(--rust);
  color: #fdfaf2;
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 0 rgba(0,0,0,0.08);
}
.cap-row.active .cap-bullet {
  background: var(--navy);
  transform: scale(1.08);
}
.cap-row.active .cap-label { color: var(--navy); font-weight: 600; }
.cap-label { color: var(--ink); }
.cap-label em {
  color: var(--rust);
  font-style: italic;
}

/* Control bar */
.plate-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
  align-items: center;
  margin-top: 1rem;
  padding: 0.9rem 1.1rem;
  background: rgba(255,253,247,0.4);
  border: 1px solid rgba(168,156,128,0.5);
  border-radius: 2px;
  font-family: var(--body);
  font-size: 0.95rem;
}

.plate-controls label {
  font-family: var(--display);
  font-variant: small-caps;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.plate-controls input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 220px;
  height: 4px;
  background: linear-gradient(90deg, var(--rust) 0%, var(--ochre) 100%);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.plate-controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--ink);
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0,0,0,0.18);
}
.plate-controls input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--ink);
  cursor: pointer;
}

.plate-readout {
  font-family: var(--body);
  font-size: 0.95rem;
  color: var(--ink-2);
  font-style: italic;
}
.plate-readout strong {
  font-style: normal;
  color: var(--rust);
  font-weight: 600;
  font-family: "Source Serif Pro", Georgia, serif;
}

/* Inset Dirac form box */
.dirac-inset {
  position: absolute;
  right: 18px;
  bottom: 18px;
  background: rgba(253,250,242,0.92);
  border: 1px solid var(--hair);
  border-radius: 2px;
  padding: 0.55rem 0.85rem;
  font-family: var(--body);
  font-size: 0.95rem;
  color: var(--ink);
  box-shadow: 0 2px 4px rgba(42,42,42,0.08);
  max-width: 260px;
}
/* Plate III's bottom-right corner is occupied by the Δv-triangle SVG and the
   ④ callout, so move the formula inset to the top-right. */
#p3-dirac {
  top: 14px;
  right: 14px;
  bottom: auto;
}
.dirac-inset .dirac-label {
  font-family: var(--display);
  font-variant: small-caps;
  letter-spacing: 0.18em;
  font-size: 0.65rem;
  color: var(--ink-2);
  display: block;
  margin-bottom: 0.25rem;
}

/* Step indicator for Plate II / III */
.assembly-stages {
  display: flex;
  gap: 0;
  align-items: stretch;
  margin-top: 0.6rem;
}
.assembly-stages .stage {
  flex: 1;
  padding: 0.5rem 0.6rem;
  text-align: center;
  font-family: var(--display);
  font-variant: small-caps;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--ink-2);
  background: rgba(245,239,226,0.4);
  border: 1px solid rgba(168,156,128,0.5);
  border-right: none;
  position: relative;
  transition: background 0.2s, color 0.2s;
}
.assembly-stages .stage:last-child { border-right: 1px solid rgba(168,156,128,0.5); }
.assembly-stages .stage.active {
  background: var(--rust);
  color: #fdfaf2;
  border-color: var(--rust-2);
}
.assembly-stages .stage.past {
  background: rgba(181,74,42,0.18);
  color: var(--rust-2);
}

/* Plate III step description */
.step-desc {
  font-family: var(--body);
  font-size: 1.0rem;
  font-style: italic;
  color: var(--ink);
  background: rgba(255,253,247,0.7);
  border-left: 3px solid var(--rust);
  padding: 0.7rem 1rem;
  margin-top: 0.9rem;
  min-height: 2.6rem;
}
.step-desc strong {
  font-style: normal;
  color: var(--rust);
  font-family: "Source Serif Pro", Georgia, serif;
}

/* Plate-end attribution line */
.plate-foot {
  font-family: var(--display);
  font-variant: small-caps;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--ink-2);
  margin-top: 1.2rem;
  text-align: center;
  border-top: 1px solid rgba(168,156,128,0.5);
  padding-top: 0.7rem;
}

@media (max-width: 700px) {
  .anatomy-section { padding: 2rem 1rem; }
  .plate { padding: 1.2rem 1rem; }
  .plate-title { text-align: left; }
  .dirac-inset { position: static; margin-top: 0.8rem; max-width: none; }
}